[hx293]

I found the following solution works thanks to pcg. Hope this is helpful.

% Freestream turbulence intensity value (default 0.05), activated for SST only
FREESTREAM_TURBULENCEINTENSITY=0.01
%
% Freestream nut / nu (default 10), activated for SST only
FREESTREAM_TURB2LAMVISCRATIO=215.56
%
% Freestream nu_tilde / nu (default 3), activated for SA only
FREESTREAM_NU_FACTOR=215.568

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% Original post as follows

Hi everyone,

I am running the incompressible RANS solver on a linear compressor cascade case (M=0.12, Rec=3.82*10^5). I tried to feed in the eddy viscosity ratio and the turbulence intensity in the configure file (see attached) as follows:

FREESTREAM_TURBULENCEINTENSITY=0.01
FREESTREAM_TURB2LAMVISCRATIO=215.56

However, these values seemed not readed in, and I got nut/nu=0.20 in the freestream (see fig attached). I checked some archived tutorial cases. It seems to me the above options are activated only for compressible RANS solver, but I am not sure if that is true and why it is implemented in this way.

Do you have any ideas?

Cheers,
Xiao

[pcg]

Looking at the code it seems you should use FREESTREAM_NU_FACTOR

The two options you tried seem to be applicable only to k-omega models.

P.S. In principle there are no differences between compressible and incompressible solver, so far as turbulence models go.